Quaker Oats Has Introduced a Line of Breakfast Cereal Packaged

Quaker Oats has introduced a line of breakfast cereal packaged in bags. These are typically found on the bottom shelf of the cereal display as they don't stack or display as well as boxes. The bags are more economical and produce less waste. Quaker Oats attempts to judge whether they are a part of the buyers' consideration set by watching people buy cereal. Identify the type of quantitative research Quaker Oats is using?

A) Observational
B) Modeling
C) Experimental
D) Survey